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CVE-2026-45657

Severity
CRITICAL
CVSS
9.8
EPSS
0.15478
Risk score
44.62
CISA KEV
No
PoC
No
Published
2026-06-09
Modified
2026-07-28
First seen
2026-08-05
Aliases
EUVD-2026-35697, GHSA-3R8R-9CJM-WHJ4
Products
Microsoft:Windows 11 Version 23H2 10.0.22631.0 <10.0.22631.7219, Microsoft:Windows 11 Version 24H2 10.0.26100.0 <10.0.26100.8655, Microsoft:Windows 11 Version 25H2 10.0.26200.0 <10.0.26200.8655, Microsoft:Windows 11 version 26H1 10.0.28000.0 <10.0.28000.2269, Microsoft:Windows Server 2022 10.0.20348.0 <10.0.20348.5256, Microsoft:Windows Server 2025 (Server Core installation) 10.0.26100.0 <10.0.26100.32995, Microsoft:Windows Server 2025 10.0.26100.0 <10.0.26100.32995, microsoft:windows_11_23h2, microsoft:windows_11_24h2, microsoft:windows_11_25h2, microsoft:windows_11_26h1, microsoft:windows_server_2022, microsoft:windows_server_2025
Sources
nvd CVE-2026-45657
euvd EUVD-2026-35697

Description

Use after free in Windows Kernel allows an unauthorized attacker to execute code over a network.

References